diff --git a/otc_doc_convertor/convertor.py b/otc_doc_convertor/convertor.py
index 4d1b248c..826cd0bb 100644
--- a/otc_doc_convertor/convertor.py
+++ b/otc_doc_convertor/convertor.py
@@ -309,7 +309,7 @@ class OTCDocConvertor:
             # DMS UMN contain: (`~!@#$%^&*()-_=+\|[{}]:'",<.>/?)
             r"\(([\W\x60_]{10,})\)",
             # MRS UMN contain: /:*?"<>|\\;&,'`!{}[]$%+
-            r"\s([^a-zA-Z0-9\s]{10,})",
+            r"\s([^a-zA-Z0-9\s]{8,})",
             # BMS API contain sequence in a dedicated paragraph
             r"^([^a-zA-Z0-9\s]{10,})$",
         ]